Sworn Ibrahim family enemy Alex Macris helped to save his father from life in prison after admitting he used him as an unsuspecting drug mule to transport $13 million worth of methamphetamine oil in jerry cans, a court has heard.

Police arrested Stelios Macris, 75, after they found 50 kilograms of meth oil in the boot of his Ford Falcon station wagon and the spare bedroom of his central coast property in 2011.

Scenes from the couple's $500,000 wedding. Photo: Supplied

But a court acquitted Mr Macris on Thursday after his son told the court he had “duped” his father into moving the drugs.

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In giving his evidence, Alex Macris said it was “low, dog act” getting his father to cart the drugs, but did so because he never dreamt police would pull him over.

Despite confessing the drugs were his, he will not face prosecution.

The wedding at Bennelong Lawn. Photo: Supplied

The court gave him a certificate granting him immunity from prosecution on the grounds that the evidence he gave was likely to incriminate himself.

Alex Macris married chicken and racing heiress Jessica Ingham in a lavish $500,000 wedding on Bennelong Lawn near the Opera House last year. His father was allowed to attend after his mother, Roula, posted $2 million bail.

A Sydney society family, the Inghams made their fortune through a successful horse racing operation and a poultry empire which they offloaded for $880 million in 2013. They were last valued on the BRW Rich List as having a wealth exceeding $1.1 billion.

Alex Macris is also the brother of nightclub owner John Macris - a man Michael Ibrahim was accused of conspiring to murder in 2009. A jury later acquitted Mr Ibrahim and family associate Rodney Atkinson.

In August 2011, a police informant tipped off the force’s Middle Eastern organised crime squad. Police were told Alex Macris was in possession of a large amount of methamphetamine oil and that he or an associate would be moving it from the central coast and Sydney.

Gosford District Court heard this week that detectives pulled over Stelios Macris on the F3 near Brooklyn on August 2.

In the boot of his car they found three metal drums filled with 26 kilograms of meth oil. The retiree claimed he thought it was petrol.

After police arrested the Mosman man they then searched his Phegans Bay property, where they found another three plastic containers and a metal drum containing a further 24 kilograms of the oil.

The oil can be used to make the crystallised form of methamphetamine, or the drug known as ice.

The trial before Judge Roy Ellis this week heard evidence that Stelios drove to the central coast to do repairs to one of his investment properties.

Alex learnt of the trip and asked his father to bring back three jerry cans he had been storing in the family's Phegans Bay property.

Detective Inspector Angelo Memmolo told the court the person who tipped off police about the drugs never mentioned the name Stelios Macris.

Solicitor Kiki Kyriacou, who was acting for barrister John Korn, said Stelios Macris had acquired his wealth through legal means and hard work.

“The evidence of Inspector Memmolo was that Mr Macris had never been mentioned by name, nor description by the source of the information to police,” Mr Kyriacou said.

“Mr Macris has never been mentioned to be involved in any way shape or form in the drug trade, nor any businesses as alleged against his sons,” he said.

Judge Ellis said there was not sufficient evidence to prove the accused knew the contents of the containers were illegal.

He found him not guilty of all four charges relating to the commercial supply of a prohibited drug.

At the time of the haul, Detective Superintendent Deb Wallace said the operation had a huge impact on a criminal network.

"We would allege that when you take 50 kilograms of ice, technically, off the street, it has a huge dent in any criminal organisation," she said. "And we would suggest that no one operates alone in these matters."